Description: Solar oxygen pump with built in a 3600mAh lithium battery for storing energy, thus the oxygen pump working in the night as well. Just put the solar panel in a sunny spot and it starts automatically. Suitable for a small to medium sized pond, outdoor fish tank or water reservoir, etc. Features: [Solar Energy]The use of solar energy makes it environment-friendly, portable and easy to install with no need for wiring, no operating cost and maintenance free, and solar power is much safer for your kid. [Battery Backup]Built in a 3.7V 3600mAh 18650 lithium battery pack for storing energy, thus the oxygen pump working in the night as well. [low Noise]Stable silent oxygen pump with less than 60 dB low noise and 0.5-0.9L/min air volume, suitable for many types of containers. [Evenly Air Distribution]There are 3 working modes can meet your different demands, and two air flow outlets make the air distribution more even and pervasive. [Adjustable Angle]The solar panel angle can be adjusted to receive the sunlight most sufficiently. Perfect for bird bath, small pond, garden decoration, water circulation for oxygen, etc. Product working mode and working time on fully charged battery : 1-Position 1: high speed (24H)2-Position 2: low speed (48H) 3-Position 3: air pump 10 seconds and off 10 seconds circularly (96H) 4-OFF Indicator color: When charging: if the battery power is 50%, the indicator is breathing red; if the battery power is 50%, the indicator is breathing blue; if the battery is fully charged, the indicator is constant blue. When air pumping: if the battery power is 50%, the indicator is red; if the battery power is 50%, the indicator is blue. Specifications: Material: ABS Solar panel0.9W, 5V PET Polycrystalline Silicon Battery2*18650 3.7V 1800mAH Lithium Battery Product voltage3V DCSound: less than 60dB Air flow0.5L/min0.9L/min Product working voltage range3.0V4.25V Charging time: by solar panel under sunlight 25H;by 5V 1A charger 5HOxygen Hose Length: 280cm / 110.23inch Cable Length: 95cm / 37.4inch Item Size: Approx. 25*7.5*4.2cm / 9.84*2.95*1.65inch Package Size: Approx. 15.5*13.5*5.5cm / 6.1*5.31*2.16inch Package Weight: Approx. 483g / 1.06lb Package List: 1 * Solar Oxygen Pump 1 * Package of Accessory 2 * Air Stone 1 * Aquarium Oxygen Pipe 1 * Manual (English)Note: 1. This product is an electronic product. The oxygen-increasing device cannot be placed in water, and the diversion hole cannot be blocked. 2. As the charging effect of the solar panel is depended on the sunlight, the LED light time is affected by weather, seasons, places, etc. 3. Install the product in an environment with sufficient sunlight to keep the transparent cover fully exposed to sunlight. 4. Regularly clean the dirt on the transparent cover to improve charging efficiency.